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Scope:

This specification covers cold-finished carbon and alloy steel
bars produced in straight length and coil to chemical compositions.
Cold-finished bars are suitable for heat treatment, for machining
into components, or for use in the as-finished condition as
shafting, or in constructional applications, or for other similar
purposes (Note 1). Grades of steel are identified by grade numbers
or by chemical composition.

NOTE 1—A guide for the selection of steel bars is contained in
Practice A400.

Some end uses may require one or more of the available
designations shown under Supplementary Requirements. Supplementary
requirements shall apply only when specified individually by the
purchaser.

The values stated in inch-pound units are to be regarded as
standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and
are not considered standard